Looks very nice and polished but it crashed on me (just exited) at 20gb each time for the first cloning. Coincidentally, this always happened after starting Xcode and opening a rather large project. I guess I'll have to wait until night to let it sync alone without touching the machine.

Good app, but allow and hour or two to create your original clone on a firewire external hard drive. Smart update of the original clone then takes about 6 minutes on my machine. The time it takes will depend on the amount of data you are backing up.

Another advantage with SuperDuper! is that it does an excellent job of defraging your hard drive - you get two programs for the price of one - check out their web site for details.

Well, I would debate the 'create a backup in moments' - that depends on the size of your volume. And after having it crash during my first use of it, I can't say it's reliable. Perhaps the newer version is different.